Catalytic cracking device

Abstract

The utility model discloses a catalytic cracking device, which relates to the technical field of petroleum processing and comprises a settling tank, a gas collecting chamber arranged at the exhaust end of the upper end of the settling tank, and a reactor arranged at the lower end of the settling tank and fixedly connected with a regenerated catalyst inclined pipe and one end of a regenerated catalyst guide pipe. The regeneration tank is fixedly connected with the regenerated catalyst inclined pipe and the other end of the regenerated catalyst guide pipe; the lower end of the regeneration tank is fixedly connected with the charring tank; a heating structure is arranged at the bottom of the charring tank, a regeneration structure is arranged in the regeneration tank, a waste gas collecting structure is arranged at the top end of the regeneration tank, the charring tank is heated through the heating structure, the combustion chamber and the outer heating chamber, the internal temperature of the charring tank is increased, and catalytic petroleum cracking of a catalyst is accelerated; through the regeneration structure, coke on the coking catalyst is burnt off by using the first regenerator and the second regenerator so as to recover the activity of the catalyst, and the catalyst is recycled; through a waste gas collecting structure, waste gas generated during catalyst recovery is sucked into a waste gas tank through a waste gas pipe, and environmental pollution is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of petroleum processing, in particular to a catalytic cracking device. Background Art

[0002] Catalytic cracking is a process in which petroleum hydrocarbons are cracked at high temperature in the presence of a catalyst to produce low-carbon olefins such as ethylene, propylene, butene, and light aromatics. Due to the presence of the catalyst, catalytic cracking can reduce the reaction temperature, increase the yield of low-carbon olefins and light aromatics, and improve the flexibility of the distribution of cracking products. Catalytic cracking is one of the main methods of secondary processing of petroleum. A catalytic cracking device described in the patent with the existing patent announcement number CN 214032345 U controls the addition of catalyst through a first control valve and a second control valve during operation; at the same time, a first control gear and a second control gear are respectively provided below the first control valve and the second control valve, a first control rod is eccentrically arranged on the first control gear to connect the valve of the first control valve, and a second control rod is eccentrically arranged on the second control gear to connect the valve of the second control valve. When the driving gear rotates forward, the first control gear is driven to rotate in the reverse direction, so that the first control rod drives the valve of the first control valve to rotate to close the first control valve. At the same time, the second control gear is connected to the driving gear through a transmission gear, so that the second control gear rotates forward, so that the second control rod drives the valve of the second control valve to rotate to open the second control valve, so that only one of the first control valve and the second control valve can be opened at the same time, and the first control valve and the second control valve are controlled to be cyclically opened and closed according to the catalyst to be added, so that only one catalyst is added at the same time, which effectively avoids the problem of interference between multiple catalysts affecting the catalytic efficiency. However, this device cannot recycle the catalyst and does not solve the problem of exhaust gas pollution.

[0003] Based on this, a catalytic cracking device is now provided, which can eliminate the disadvantages of the existing devices. Utility Model Content

[0004] The utility model aims to provide a catalytic cracking device to solve the problems in the background technology that the catalyst cannot be recycled and the waste gas pollution is not solved.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A catalytic cracking device includes a settling tank, wherein the upper exhaust end of the settling tank is provided with a gas collecting chamber for collecting oil and gas, the lower end of the settling tank is provided with a reactor for catalytic cracking of heavy oil, the feed port of the reactor is connected to one end of a regeneration catalyst inclined tube, the other end of the regeneration catalyst inclined tube is fixedly connected to the feed port of the regeneration tank, the discharge port of the regeneration tank is fixedly connected to one end of a regeneration catalyst conduit, the feed port of the reactor is fixedly connected to the other end of the regeneration catalyst conduit, and the lower end of the regeneration tank is fixedly connected to a coking tank; a heating structure is provided at the bottom of the coking tank for increasing the temperature in the coking tank and accelerating cracking. A regeneration structure is provided inside the regeneration tank for separating coke on the coked catalyst to restore the activity of the catalyst. An exhaust gas collection structure is provided at the top of the regeneration tank for collecting exhaust gas generated by the recovery catalyst to avoid environmental pollution.

[0007] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0008] In an optional scheme: the heating structure includes a combustion chamber, the upper end of the combustion chamber is fixedly connected to a mixing tube, the upper end of the mixing tube is fixedly connected to a charring tank, the side of the charring tank is fixedly connected to an upper inclined tube of a circulating catalyst, the other end of the upper inclined tube of the circulating catalyst is fixedly connected to an external heating chamber, the external heating chamber is fixedly connected to a lower inclined tube of the circulating catalyst, and the other end of the lower inclined tube of the circulating catalyst is fixedly connected to the mixing tube.

[0009] In an optional solution: the regeneration structure includes a fixed disk, the fixed disk is fixedly connected to the first regenerator and the second regenerator, the bottom end of the first regenerator is fixedly connected to the first conduit, and the bottom end of the second regenerator is fixedly connected to the second conduit.

[0010] In an optional scheme: the exhaust gas collection structure includes an exhaust gas tank, the lower end of the exhaust gas tank is fixedly connected to the exhaust gas pipe, the exhaust gas pipe is fixedly connected to the second regenerator, the second regenerator is fixedly connected to the connecting pipe, the other end of the connecting pipe is fixedly connected to the connecting block, and the lower end of the connecting block is fixedly connected to the first regenerator.

[0011] In an optional solution: a grille is added in the middle of the sedimentation tank.

[0012] In an optional solution: a large-hole distribution plate is provided at the outlet of the coking tank.

[0013] In an optional solution: a plurality of activated carbons are arranged inside the exhaust gas tank.

[0014] In an optional solution: a single-acting sliding valve is provided in the middle of the regenerated catalyst inclined tube.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. The utility model uses a heating structure to heat the burnt tank using a combustion chamber and an external heating chamber, thereby increasing the internal temperature of the burnt tank and accelerating the catalytic cracking of petroleum by the catalyst.

[0017] 2. The utility model uses a regeneration structure to utilize the first regenerator and the second regenerator to burn off the coke on the coked catalyst to restore the activity of the catalyst, so that the catalyst can be recycled.

[0018] 3. The utility model uses the waste gas collection structure and the waste gas pipe to guide the waste gas generated when the catalyst in the regeneration structure is restored into the waste gas tank to avoid waste gas pollution of the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure 2 It is a structural schematic diagram of the upper end of the utility model.

[0021] Figure 3 It is a structural schematic diagram of the side position of the utility model.

[0022] Figure 4 It is a structural schematic diagram of the regeneration structure position of the utility model.

[0023] Notes on figure numbers: 11. Gas collecting chamber; 12. Settling tank; 13. Reactor; 14. Regenerated catalyst inclined tube; 15. Regeneration tank; 16. Charring tank; 17. Combustion chamber; 18. Circulating catalyst upper inclined tube; 19. Circulating catalyst lower inclined tube; 20. External heating chamber; 21. Mixing tube; 22. Fixed plate; 23. First regenerator; 24. First conduit; 25. Second regenerator; 26. Second conduit; 27. Connecting block; 28. Connecting pipe; 29. ​​Waste gas tank; 30. Waste gas pipe; 31. Regenerated catalyst conduit. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] Example 1

[0026] In one embodiment, Figure 1-Figure 4As shown, a catalytic cracking device includes a settling tank 12, wherein the upper exhaust end of the settling tank 12 is provided with a gas collecting chamber 11 for collecting oil and gas, and the lower end of the settling tank 12 is provided with a reactor 13 for catalytic cracking of heavy oil, the feed port of the reactor 13 is connected to one end of a regeneration catalyst inclined tube 14, and the other end of the regeneration catalyst inclined tube 14 is fixedly connected to the feed port of a regeneration tank 15, the discharge port of the regeneration tank 15 is fixedly connected to one end of a regeneration catalyst conduit 31, and the feed port of the reactor 13 is fixedly connected to the other end of the regeneration catalyst conduit 31, and the lower end of the regeneration tank 15 is fixedly connected to a coke tank 16; a heating structure is provided at the bottom of the coke tank 16 to increase the temperature in the coke tank 16 and accelerate cracking. A regeneration structure is provided inside the regeneration tank 15 to separate the coke on the coked catalyst to restore the activity of the catalyst. An exhaust gas collection structure is provided at the top of the regeneration tank 15 to collect exhaust gas when restoring the catalyst to avoid environmental pollution.

[0027] In this embodiment, during operation, the heating structure is used to increase the internal temperature of the coking tank 16 to accelerate the catalyst-catalyzed petroleum cracking. The raw material enters the lower end of the reactor 13, contacts the high-temperature catalyst from the regeneration structure and is immediately vaporized. The steam carries the catalyst into the bottom of the settling tank 12. The coked catalyst is brought into the regenerated catalyst inclined tube 14 by the settler inside the settling tank 12. The coked catalyst enters the regeneration structure through the regeneration catalyst inclined tube 14. The regeneration structure burns off the coke on the coked catalyst to restore the activity of the catalyst. The restored active catalyst enters the reactor 13 through the regeneration catalyst conduit 31. The exhaust gas generated when the catalyst is restored enters the exhaust gas collection structure to avoid exhaust gas pollution of the environment.

[0028] In one embodiment, Figure 1 As shown, the heating structure includes a combustion chamber 17, the upper end of the combustion chamber 17 is fixedly connected to a mixing tube 21, the upper end of the mixing tube 21 is fixedly connected to a charring tank 16, the side of the charring tank 16 is fixedly connected to an upper inclined tube 18 of a circulating catalyst, the other end of the upper inclined tube 18 of the circulating catalyst is fixedly connected to an external heating chamber 20, the external heating chamber 20 is fixedly connected to a lower inclined tube 19 of a circulating catalyst, and the other end of the lower inclined tube 19 of the circulating catalyst is fixedly connected to the mixing tube 21. The charring tank 16 is heated by the combustion chamber 17 and the external heating chamber 20 to increase the internal temperature of the charring tank 16 and accelerate the catalyst-catalyzed petroleum cracking.

[0029] In one embodiment, Figure 4 As shown, the regeneration structure includes a fixed plate 22, which is fixedly connected to a first regenerator 23 and a second regenerator 25. The bottom end of the first regenerator 23 is fixedly connected to a first conduit 24, and the bottom end of the second regenerator 25 is fixedly connected to a second conduit 26. The first regenerator 23 and the second regenerator 25 are used to burn off the coke on the coked catalyst to restore the activity of the catalyst so that the catalyst can be recycled.

[0030] In one embodiment, Figure 3 and Figure 4 As shown, the exhaust gas collecting structure includes an exhaust gas tank 29, the lower end of the exhaust gas tank 29 is fixedly connected to the exhaust gas pipe 30, the exhaust gas pipe 30 is fixedly connected to the second regenerator 25, the second regenerator 25 is fixedly connected to the connecting pipe 28, the other end of the connecting pipe 28 is fixedly connected to the connecting block 27, the lower end of the connecting block 27 is fixedly connected to the first regenerator 23, and the exhaust gas pipe 30 is used to introduce the exhaust gas generated when the catalyst in the regeneration structure is restored into the exhaust gas tank 29 to avoid exhaust gas polluting the environment.

[0031] In one embodiment, Figure 1 As shown, a grid is added in the middle of the settling tank 12 to prevent the coke blocks on the top of the settling tank 12 from falling off and blocking the reactor 13, thereby affecting the cracking efficiency.

[0032] In one embodiment, Figure 3 As shown, a large-hole distribution plate is provided at the outlet of the coking tank 16 to increase the diameter of the holes in the distribution plate, improve the regeneration efficiency, increase the catalyst storage and the coking amount, and improve the coking efficiency.

[0033] Example 2

[0034] In one embodiment, Figure 1 As shown, some activated carbon is arranged inside the exhaust gas tank 29, and the activated carbon absorbs dust in the exhaust gas to prevent the exhaust gas from polluting the environment.

[0035] In one embodiment, Figure 1 and Figure 4 As shown, a single-acting slide valve is provided in the middle of the regenerated catalyst inclined tube 14. The single-acting slide valve is fully open under normal circumstances. If an emergency occurs, the single-acting slide valve can be used to cut off the connection between the reactor 13 and the regeneration tank 15 to avoid catalyst backflow.

[0036] The above embodiment discloses a catalytic cracking device, in which the combustion chamber 17 and the external heating chamber 20 are used to heat the burnt tank 16 to increase the internal temperature of the burnt tank 16 and accelerate the catalyst-catalyzed petroleum cracking. The raw material enters the lower end of the reactor 13 and contacts with the high-temperature catalyst and is immediately gasified. The steam carries the catalyst into the bottom of the settling tank 12. The coked catalyst is brought into the regenerated catalyst inclined tube 14 by the internal settler of the settling tank 12. The coked catalyst enters the first regenerator 23 and the second regenerator 25 through the regenerated catalyst inclined tube 14. The first regenerator 23 and the second regenerator 25 are used to burn off the coke on the coked catalyst to restore the activity of the catalyst. The restored catalyst enters the reactor 13 through the regenerated catalyst conduit 31, so that the catalyst can be recycled. The exhaust gas pipe 30 is used to introduce the exhaust gas generated when the catalyst is restored in the regeneration structure into the exhaust gas tank 29 to avoid exhaust gas pollution of the environment.

[0037] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A catalytic cracking device, comprising a settling tank (12), wherein an upper exhaust end of the settling tank (12) is provided with a gas collecting chamber (11) for collecting oil and gas, and a lower end of the settling tank (12) is provided with a reactor (13) for catalytic cracking of heavy oil, wherein a feed port of the reactor (13) is connected to one end of a regeneration catalyst inclined tube (14), and the other end of the regeneration catalyst inclined tube (14) is fixedly connected to a feed port of a regeneration tank (15), and a discharge port of the regeneration tank (15) is fixedly connected to one end of a regeneration catalyst conduit (31), and the feed port of the reactor (13) is fixedly connected to the other end of the regeneration catalyst conduit (31), and the lower end of the regeneration tank (15) is fixedly connected to a coking tank (16); It is characterized in that It also includes a heating structure, which is arranged at the bottom of the charring tank (16) and is used to increase the temperature inside the charring tank (16) to accelerate cracking; A regeneration structure, which is arranged inside the regeneration tank (15) and is used to separate coke from the coked catalyst to restore the activity of the catalyst; An exhaust gas collection structure is provided at the top of the regeneration tank (15) and is used to collect exhaust gas generated by the recovery catalyst to avoid environmental pollution.

2. A catalytic cracking device according to claim 1, characterized in that: The heating structure comprises a combustion chamber (17), the upper end of the combustion chamber (17) is fixedly connected to a mixing tube (21), the upper end of the mixing tube (21) is fixedly connected to a coking tank (16), the side of the coking tank (16) is fixedly connected to an upper inclined tube (18) of a circulating catalyst, the other end of the upper inclined tube (18) of the circulating catalyst is fixedly connected to an external heating chamber (20), the external heating chamber (20) is fixedly connected to a lower inclined tube (19) of a circulating catalyst, and the other end of the lower inclined tube (19) of the circulating catalyst is fixedly connected to the mixing tube (21).

3. A catalytic cracking device according to claim 1, characterized in that: The regeneration structure comprises a fixed disk (22), wherein the fixed disk (22) is fixedly connected to a first regenerator (23) and a second regenerator (25), wherein the bottom end of the first regenerator (23) is fixedly connected to a first conduit (24), and the bottom end of the second regenerator (25) is fixedly connected to a second conduit (26).

4. A catalytic cracking device according to claim 3, characterized in that: The exhaust gas collection structure comprises an exhaust gas tank (29), the lower end of the exhaust gas tank (29) is fixedly connected to an exhaust gas pipe (30), the exhaust gas pipe (30) is fixedly connected to a second regenerator (25), the second regenerator (25) is fixedly connected to a connecting pipe (28), the other end of the connecting pipe (28) is fixedly connected to a connecting block (27), and the lower end of the connecting block (27) is fixedly connected to the first regenerator (23).

5. A catalytic cracking device according to claim 1, characterized in that: A grid is added at the middle position inside the sedimentation tank (12).

6. A catalytic cracking device according to claim 1, characterized in that: A large-hole distribution plate is arranged at the outlet of the coking tank (16).

7. A catalytic cracking device according to claim 4, characterized in that: A plurality of activated carbons are arranged inside the waste gas tank (29).

8. A catalytic cracking device according to claim 1, characterized in that: A single-acting slide valve is arranged at a middle position inside the regenerated catalyst inclined tube (14).

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